you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
Amino acids doesn't react with the biuret reagent.
in biuret test the presence of peptide bonds gives a violet color. but it should be noted that a minimum of two peptide bonds should be present in the protein to get a positive answer to this test.
You must have at least two, those that will form the peptide linkage (NH2 and COOH) since Biuret test is for detecting peptide linkages.
you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
No. The Biuret test only gives a positive result if a peptide bond exists. Phenol doesn't have a peptide bond, so it will not give a positive test.
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
Albumin and pepsin are both proteins, the test for proteins was positive.
Amino acids doesn't react with the biuret reagent.
A positive test, when using Biuret reagent, would be purple-ish
The biuret solution used in the biuret test for peptide bonds is blue in the absence of peptide bonds or biuret which also results in a positive result. A positive result for peptide bonds or biuret is apparent as the biuret solution turns purple/violet in color.
no! no change in colour confirms presence of cysteine
Hey. okay.. the biuret test is a test for peptide bonds. when CuSO4 is added to KOH, an alkaline solution, nitrogen atoms from the peptide bond forms a purple compound with the Cu2+ ions. hope this helps! read it in a text book.
in biuret test the presence of peptide bonds gives a violet color. but it should be noted that a minimum of two peptide bonds should be present in the protein to get a positive answer to this test.
The conclusion is that the sample contain proteins.
Casein form a purple compound in the biuret test.